ARTBA took issue May 19 with the U.S. Environmental Protection Agency’s (EPA) latest efforts to impose stricter federal Clean Air Act (CAA) standards for ozone. The association told the agency’s Clean Air Scientific Advisory Committee (CASAC) that tightened ozone standards could cost as much as $90 billion per year and jeopardize transportation improvements. Under the CAA, EPA is required to review, though not change, standards every five years for a variety of pollutants. The consequence of this required process is significant, as counties unable to comply with stricter air quality standards can have their federal highway funds withheld. Specifically, ARTBA argued there is no need to tighten federal ozone standards because current standards are working and cited numerous federal actions that are already reducing ozone levels. ARTBA also urged the CASAC to consider that tighter standards could have negative impacts on both employment and transportation improvements if federal highway funds are put at risk. Read ARTBA’s comments.